Improved rest for lathes for turning spheres



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PB ILIPP. WnNznLgoF MAYENon-oN- frnn-RHINE, enRMANinnssiGNon fro IGNAfr-LUS "Hannon PHILADELPHIA, PENNSYLVANIA.

i Letters Patent No'. 94,930, dated September la, 1869;

IivrPnQvr-.D REST PoR LATHES PoR TURNING splashes. f

To all whom it may concern.-

st ructed, arranged, and operating as fully described hereafter, for the purpose of' turning ,ball-'valves round shot, billiard-balls, and other objects which are required'to be of a perfectly spherical form. ln order to enable others skilled in the art to make a'nd use myinvention, I willnow proceed to describe its construct-ion and operation, reference being had to the-accompanying drawing, which forms' a part. of this specilication, andin which- Figure 1 is aV sectional elevation of my improved slide-rest for lathes for turning spheres.

4Figure 2, an end viewof the same. Figure .3, a sectional plan View on the line 1 2,

, fig. l.

Figure 4, a View et' a portion of a lathe, with my improved slide-rest, drawn' to a reduced scale.V Similar letters refer to similar parts throughout the several v iews.- i

Upon the plateA, which is secured to the bedplate A' of a lathe in the usual manner, rests a bed or carriage, B, which isarranged to slide between means of a, worm wheel, G, which is secured to it] between the bushings (l d', this wheel being operated by a worm, c, on a spindle, j', which vis arranged to turn onthe ,bed V1?, and-is provided with va crank- '.lo the upper end of the stem F, and restingupon a shoulder, i, of the same, is secured an arm, H, upon which is arranged to slide the tool-restJ, m0- tion ineither direction being imparted-to the latter by 'means of a screw, lt, which passes through a nut, l,`oftherest.v4

The tool M passes through an opening ina ixed stem, r, of the rest J, and is tightened inthe said opening by means of a`set--screw, s, in the usual manner.

In order to-explain the operation 'of my. in'vention, it will be necessary to refer to iig. 4, in which part of a ylathe and the sliderest,drawn to a reduced scale, are shown. l

A' hollow ,metal box, t, is screwed tothe spindle The Schedule referred to in these Letters Patent and making part of the same.

of the lathe, for the reception ot' a Awooden clamp,

u, which is turned out so as to, approximate to the` diameter of the ball which is to he' liinished, and the latter is driven tightly into this recess, so that it may be prevented from turning in the-same and oiier sufficient resista'ce to' the tocl M After this, the slide-rest is moved on the bed of the lathe to about the 'postioufshowm the plate A4 and carriage B heilig then accurately adjusted, soy that the centres of the stem F and ball :v Ato be turned, shall be upon the samevertical line y. (See L`This having been donefallj that is necessary is to so adjust the tool, by means of 4the screw It, that it 4shall bebrought in contact with the surface-of .the i ball which is to be turned. yAfter this, the .lathe-spindle and b all are setin motion, and the stein F is revolved by means of its worm and wheel, operated by the crankf', the] tool M being, by this means, caused 'toitravel around the ballin a horizontal curve, described from the centre of thestem F, that portion of the ball` which projects from the clampulieing consequently turned with perfect truth. The remaining part of the ball is treated in the same manner by'detaching it from the lathe-spindle, turning it, and presenting its unfinished side. to the tcol,.a's above. l

It is not necessary, however, that the ball should be @thus detached and finished, one-half at a time, as 'it may be turned oli' at one operation, either by casting a stern ou one of its sides, and thus securing it to the lathe -spiudle, or by screwing a steml into a hole in the ball, which can be plugged up afterwards, as in the case of hollow shot, dto.

The above slide-rest can be attached to any lathe, I providing only that the tool is placed at the same,

height as the latlies spindle, and by its use an operatorof but moderate skill can turn spheres absolutely true in but a small portionoi' the time required by the ordinary methods.

`I do not claim broadly a tool secured to a slide moving on a f'ramet'urning onthe slide of 'a lathe;

but

I claim as my inventiomanddesire to secure by Letters Patent;

The arrangement, herein described, of the :carriage B, its pillars c c, und plate D; the conical stem F, its 

